Foot accelerator



June 22 1926.

P. G. KRENZ FOOT ACCELERATOR Filed May 5, 1926 Inventor Attorney Patented lane 222, loss.

PAUL G. 'KRENZ, OF WHITE SALMON, WASHINGTON.

room ACCELERATOR.

Application filed May 3, 1926. Serial No. 106,444.

his invention relates to a foot operated device for controlling the fuel charge to an automobile carburetor, and it may be broadly referred to as a foot accelerator.

My principal object is to provide a structure of this kind which is such as to permit a gradual feed of to the carburetor on the initial pressure on the pedal, at which time a comparatively great movement of the pedal is required in order to avoid a sudden demand of the carburetor for fuel and to thus minimize choking.

An equally important object is to provide a structure of this kind which includes simple and inexpensive parts associated in a way to render the device positive and of fioient to facilitate installation, and to in sure the production of an altogether commerciallv successful structure due to the reduced cost of manufacture.

Other features and advantages of the invention will become apparent from the following description and drawings.

Referring to the drawing Figure 1 is side elevation of a device constructed in accordance with the invention sl'iowing the method of installation.

Figure 2 is a top plan view of the device.

Refe ring to the parts in detail it will be seen that the reference character 1 designates the floor board of an automobile which is provided with an opening 2 to accommodate the elongated shank 3 of the foot pedal l. This shank extends through the opening and is pivotally connected to an operating lever 5 having rack teeth 6 along one longitudinal. edge. This lever 5 is pivotally mounted at '7 upon the lower horizontal bar 8 of a substantially triangular frame 9. The frame includes an upwardly inclined top bar 10, a cross brace 11 and a flattened apex portion 12. The ends of the arms 8 and 10 terminate in attaching cars 13 which are suitably fastened to the underside of the running board as shown. in operating rod 14 is employed and extends through. appropriate bearings formed in the parts 11 and 12 of the frame. This operating rod is provided on its inner end with a fork carrying a pinion 15. The teeth of which are in mesh with the teeth of the rack 6. The spring means (not shown) is associated with the operating rod for maintaining the pinion in mesh with the rack teeth. It will be noted that the upper end of the lever 5 extends through anelongated slot 16 in the bar 10.

lVith the arrangement specified it is obvious that when pressure is placed upon the foot pedal, a comparatively great movement is required to impart a comparatively short longitudinal movement to the operating rod 1%. In this way a small charge only of gas is permitted to the carburetor. As the pressure on the pedal is continued, the are through which the lever travels is such as to gradually increase the movement of the op erating rod 1%. Due to the relation of the operating rod and lever and by the presence of the rack and pinion, no binding action occurs in view of the rolling of the pinion upon the rack. When the pedal is forced all the way down, the speed of travel of the operating rod is increased. Thus it will be seen that when a small quantity of gas is required for the initial movement of the automobile, only such a proportion is allowed by this control device. However, as the speed increases and the demand of the carburetor is greater, this device operates in proportion to compensate for this.

No doubt by considering the description in connection with the drawings, persons familiar with devices of this class will be able to obtain a clear understanding of the construction and the advantages derived therefrom, therefore a more lengthy description is thought unnecessary.

While the preferred embodiment of the in vention will be shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is 1. In a device of the class described, in combination, a foot board, a support on said footboard, said support being provided with bearings, an operating rod slidably mounted in said bearings, a lever pivotally mounted on said support and having operating connection with said rod, said lever being disposed at a substantial right angle to said operating rod, and a foot pedal pivotally connected to said lever and extending through an opening in said foot board.

2. In a foot accelerator of the class described, a frame adapted to be mounted upon a foot board, said frame being provided with bearings, a carburetor controlling rod slidable in said bearings, a lever pivotally mounted upon said frame and disposed at a ill) l controlling rod slidably mounted in said bearings, an operating lever pivotally mounted upon said frame and disposed at right angles to said rod, said lever being provided with rack teeth, said rod being provided with a pinion meshing With said teeth, and an operating pedal pivotally connected With the upper portion of said lever.

In testimony whereof I aflix my signature.

PAUL G. KRENZ. 

